With heap_guard enabled on your binaries, heap overflows are a thing of the past!
This is a remote level, you can access it with:
$ nc pwn.w3challs.com 31325
Protections: ASLR (PIE), NX, SSP, Full RELRO, FORTIFY_SOURCE.
This challenge is running in a docker container, with the latest Ubuntu 18.04 kernel.
If you have issues with the MTU, remember that you can use another SSH user on the pwn machine to access this challenge from localhost.
The binary was edited on 07/01/2020. Make sure you work on the correct version.